syzkaller login: [ 30.453998] BUG: Bad rss-counter state mm:000000001b9ac33a type:MM_FILEPAGES val:33 [ 30.454770] BUG: Bad rss-counter state mm:000000001b9ac33a type:MM_ANONPAGES val:22 [ 30.586207] ================================================================== [ 30.586847] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.587457] Read of size 8 at addr ffff88800c9e1228 by task sshd/221 [ 30.587972] [ 30.588122] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.588700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.589347] Call Trace: [ 30.589580] [ 30.589787] dump_stack_lvl+0x91/0xf0 [ 30.590123] print_report+0xcc/0x620 [ 30.590458] ? __virt_addr_valid+0x102/0x340 [ 30.591081] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.591568] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.591993] kasan_report+0xbe/0xf0 [ 30.592322] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.592743] vma_interval_tree_remove+0xc75/0xec0 [ 30.593189] vma_prepare+0xc54/0x11a0 [ 30.593581] __split_vma+0x5af/0x950 [ 30.593899] ? __pfx___split_vma+0x10/0x10 [ 30.594266] ? find_held_lock+0x2c/0x110 [ 30.594662] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.595055] ? lock_is_held_type+0x9f/0x120 [ 30.595427] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.595869] ? mtree_range_walk+0x632/0x900 [ 30.596260] ? mas_walk+0x5c7/0x7c0 [ 30.596604] do_vmi_munmap+0x1f1/0x2b0 [ 30.596972] mmap_region+0x1f9/0x2660 [ 30.597313] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.597711] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.598275] ? __pfx_lock_acquire+0x10/0x10 [ 30.598640] ? __pfx_mmap_region+0x10/0x10 [ 30.599004] ? security_mmap_addr+0x7d/0xa0 [ 30.599376] ? get_unmapped_area+0x1f5/0x3f0 [ 30.599774] do_mmap+0x854/0xf00 [ 30.600095] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.600445] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.600826] ksys_mmap_pgoff+0x3af/0x500 [ 30.601267] do_syscall_64+0x3f/0x90 [ 30.601615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.602065] RIP: 0033:0x7f6b06c8dd82 [ 30.602385] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.603870] RSP: 002b:00007ffc16ec2ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.604556] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b06c8dd82 [ 30.605182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b060c7000 [ 30.605836] RBP: 00007f6b060c7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.606459] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7cd840d90 [ 30.607058] R13: 00007ffc16ec2ec0 R14: 00007ffc16ec2ef0 R15: 00007ffc16ec3250 [ 30.607660] [ 30.607852] [ 30.607995] Allocated by task 214: [ 30.608282] kasan_save_stack+0x22/0x50 [ 30.608652] kasan_set_track+0x25/0x30 [ 30.609026] __kasan_slab_alloc+0x59/0x70 [ 30.609404] kmem_cache_alloc+0x16b/0x370 [ 30.609776] vm_area_dup+0x20/0x160 [ 30.610110] __split_vma+0x170/0x950 [ 30.610450] split_vma+0xc6/0x110 [ 30.610741] mprotect_fixup+0x8d2/0xb30 [ 30.611065] do_mprotect_pkey+0x87e/0xd40 [ 30.611394] __x64_sys_mprotect+0x78/0xc0 [ 30.611737] do_syscall_64+0x3f/0x90 [ 30.612057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.612489] [ 30.612632] Freed by task 214: [ 30.612943] kasan_save_stack+0x22/0x50 [ 30.613320] kasan_set_track+0x25/0x30 [ 30.613667] kasan_save_free_info+0x2b/0x50 [ 30.614036] __kasan_slab_free+0x10a/0x190 [ 30.614413] kmem_cache_free+0x10d/0x4d0 [ 30.614758] rcu_core+0x8c8/0x2860 [ 30.615061] __do_softirq+0x1b7/0x7d4 [ 30.615392] [ 30.615541] Last potentially related work creation: [ 30.615937] kasan_save_stack+0x22/0x50 [ 30.616284] __kasan_record_aux_stack+0x8e/0xa0 [ 30.616729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.617215] remove_vma+0x139/0x170 [ 30.617530] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.617901] do_vmi_munmap+0x1f1/0x2b0 [ 30.618219] __vm_munmap+0x138/0x3a0 [ 30.618524] __x64_sys_munmap+0x59/0x80 [ 30.618856] do_syscall_64+0x3f/0x90 [ 30.619214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.619678] [ 30.619825] The buggy address belongs to the object at ffff88800c9e11d0 [ 30.619825] which belongs to the cache vm_area_struct of size 168 [ 30.620886] The buggy address is located 88 bytes inside of [ 30.620886] freed 168-byte region [ffff88800c9e11d0, ffff88800c9e1278) [ 30.621841] [ 30.621990] The buggy address belongs to the physical page: [ 30.622433] page:000000001285c436 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9e1 [ 30.623189] memcg:ffff888019dfcc01 [ 30.623487] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.623939] page_type: 0xffffffff() [ 30.624250] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.624914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dfcc01 [ 30.625554] page dumped because: kasan: bad access detected [ 30.626010] [ 30.626159] Memory state around the buggy address: [ 30.626569] ffff88800c9e1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.627162] ffff88800c9e1180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.627755] >ffff88800c9e1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.628337] ^ [ 30.628737] ffff88800c9e1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.629333] ffff88800c9e1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.629898] ================================================================== [ 30.630689] Disabling lock debugging due to kernel taint [ 32.307640] BUG: Bad rss-counter state mm:000000001b9de312 type:MM_FILEPAGES val:33 [ 32.308649] BUG: Bad rss-counter state mm:000000001b9de312 type:MM_ANONPAGES val:22 [ 32.739449] BUG: Bad rss-counter state mm:00000000673f52ae type:MM_FILEPAGES val:33 [ 32.740248] BUG: Bad rss-counter state mm:00000000673f52ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54292' (ECDSA) to the list of known hosts. 2023/06/21 09:01:40 fuzzer started 2023/06/21 09:01:40 dialing manager at localhost:36067 2023/06/21 09:01:40 checking machine... 2023/06/21 09:01:40 checking revisions... [ 33.267981] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:01:40 testing simple program... [ 33.305011] cgroup: Unknown subsys name 'net' [ 33.336818] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:01:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffc3b103db8 CR3=000000000e932000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2030343a31303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a31303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e64d000 RCX=0000000000000080 RDX=0000000000000000 RSI=0000000000000040 RDI=ffff8880164b8f68 RBP=ffff8880164b8f58 RSP=ffff88800ec074a8 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000020 R11=000009dd000009dd R12=ffff88801c712000 R13=ffff88800e64d06c R14=ffff88800ec07728 R15=00000000fffffffd RIP=ffffffff83c56a83 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f54e8ea3900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f54e945a618 CR3=000000000ebd0000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000